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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 34981 - 35000 of 35448 results
  • Protecting the AG pilot
    Protecting the AG pilot.
    Mohler, Stanley R. ;
    Harper, Charles R.
    1966-09-01 | PDF
    Summarized data resulting from a detailed review of fatal and non-fatal aerial applicator accidents are presented with an analysis of the factors underlying the accidents. The role of toxic substance is evaluated. Preventive and newer therapeutic approaches are given.
  • Oxygen in general aviation
    Oxygen in general aviation.
    Mohler, Stanley R.
    1966-09-01 | PDF
    General aviation pilots are increasingly ascending to altitudes exceeding ten thousand feet. As one becomes exposed to heights above twelve thousand feet, blood oxygen saturation diminishes in accordance with a predicable schedule. Recommended measures for the provision of adequate supplemental oxygen are described.
  • Highway Signing Research Phase II Characterization of SignFacing Materials
    Highway Signing Research: Phase II, Characterization of Sign-Facing Materials
    Funnell, J. E. ;
    Curtice, D. K.
    1966-08-05 | PDF
    The purpose of this investigation has been to develop, through laboratory and related field studies, sufficient information to permit appraisal of the adequacy of current performance specifications for sign-facing materials. In order to accomplish this, the characteristics of available commercial materials of several generic classes were studied to ...
  • A Study of Factors Affecting the Operation of a Locked Wheel Skid Trailer
    A Study of Factors Affecting the Operation of a Locked Wheel Skid Trailer
    McCullough B. F. ;
    Hankins, K D
    1966-08-01 | PDF
    In an effort to provide a safer highway system in the State of Texas, the Equipment and Procurement Division shops of the Texas Highway Department are fabricating three additional skid test trailers at the present time. It is contemplated that the Maintenance Operations Division will direct the operations of the test trailers and the one trailer wi ...
  • Additional Rheological Properties of 85100 Penetration Asphalt Cements Used in Field Tests Initiated During 196364
    Additional Rheological Properties of 85–100 Penetration Asphalt Cements Used in Field Tests Initiated During 1963–64
    Traxler, R. N.
    1966-08-01 | PDF
    The objective of this research was to determine the viscosities of asphalt cements at 60° and 50°F, and their microductilities at 77° and 60°F. The conclusions were as follows: (1) Determination of the viscosities of asphalt cements at 50° and 60°F has led to the conclusion that methods other than the thin film, sliding plate viscometer should be u ...
  • Intersection and Sign Illumination for Highway Safety and Efficiency
    Intersection and Sign Illumination for Highway Safety and Efficiency
    Keese, Charles J. ;
    Cleveland, Donald E.
    1966-08-01 | PDF
    This final report (Research Report 5-9 Final) summarizes the findings of several years of research on intersection illumination. The research was conducted by the Texas Transportation Institute in cooperation with the Texas Highway Department and the Department of Commerce, Bureau of Public Roads.
  • Overhead Sign Illumination Relationships
    Overhead Sign - Illumination Relationships
    Cleveland, Donald E.
    1966-08-01 | PDF
    The purpose of this study was to examine the relationships between the legibility of overhead signs and the brightness configurations which can result when various vehicle, sign, and roadway lighting conditions exist for a number of commonly used high type sign materials, The effects of the variables are expressed in legibility distances to enable ...
  • Traffic Operations Illumination Studies
    Traffic Operations - Illumination Studies
    Cleveland, Donald E.
    1966-08-01 | PDF
    The objective of this report is to present the results of studies of operational characteristics of highway traffic moving through an intersection at which a number of illumination schemes had been installed. The characteristics reported are related to the ease of operation of the motorist as he passes through the intersection.
  • Bending Strength of Asphaltic Concrete
    Bending Strength of Asphaltic Concrete
    Jimenez, R. A.
    1966-08-01 | PDF
    This report is concerned with the flexural fatigue strength of asphaltic concrete surfacing mixtures as measured by a repetitive deflection test on disc-shaped specimens, and the static bending or tensile strength as determined from a modified cohesiometer test. Results were obtained for laboratory-prepared specimens with varying asphalt content, a ...
  • The Use of Particulate Mechanics in the Simulation of StressStrain Characteristics of Granular Materials
    The Use of Particulate Mechanics in the Simulation of Stress-Strain Characteristics of Granular Materials
    Armstrong, James C. ;
    Dunlap, Wayne A.
    1966-08-01 | PDF
    The objectives of this research were: A) To develop expressions relating stress and strain for various arrays of elastic spheres. B) To compute the stress-strain curves of the arrays using the equations developed in A) above for a range of parameters (elastic constants and coefficient of friction), encompassing those which might be expected for act ...
  • An Interim Report on a Study of Roadway Lighting Systems
    An Interim Report on a Study of Roadway Lighting Systems
    Rowan, Neilon J. ;
    McCoy, Patrick T.
    1966-08-01 | PDF
    In 1964, the Texas Transportation Institute initiated a research project, "Supplementary Studies in Highway Illumination," under the sponsorship of the Texas Highway Department in cooperation with the U. S. Bureau of Public Roads. The ultimate goal is the research is to produce definite criteria for the design of a visual environment which is condu ...
  • Emergency evacuation tests of a crashed L1649
    Emergency evacuation tests of a crashed L-1649.
    Garner, J.D. ;
    Blethrow, John G.
    1966-08-01 | PDF
    Four basic evacuation tests were performed on a crashed L-1649 in Phoenix, Arizona, to document problem areas, passenger reaction, emergency lighting, slope of flooring and other items affecting passenger egress. Two day and two night tests were run with different crew and passengers for each. The tests were designed to observe the reactions of the ...
  • Magnitude and Frequency of Iowa Floods
    Magnitude and Frequency of Iowa Floods
    Schwob, Harlan H
    1966-07-01 | PDF
    Flood records for regular and partial-record gaging stations are contained in this report. Each listing contains the station number and name, descriptive paragraphs pertaining to the station, and a listing of the flood peaks available through the 1965 water year (October 1, 1964 to September 30, 1965). Peaks above a base as well as annual peaks are ...
  • Quality control analysis part II soil and aggregate base course
    Quality control analysis : part II : soil and aggregate base course.
    Shah, S. C.
    1966-07-01 | PDF
    This is the second of the three reports on the quality control analysis of highway construction materials.It deals with the statistical evaluation of results from several construction projects to determine the basic pattern of variability with respect to certain base course characteristics. On the basis of this variability, numerical limits have be ...
  • Problems in depth perception equidistance judgments in the vicinity of a binocular illusion
    Problems in depth perception : equidistance judgments in the vicinity of a binocular illusion.
    Agee, Frank L. ;
    Gogel, Walter C.
    1966-07-01 | PDF
    Judgments of the size and distance of objects are sometimes made in aircraft under background-viewing conditions that may themselves create false sensory impressions (illusions). In this study, the effects of a background illusion on judgments of the size and distance of objects that were independent of that background were examined. Misleading siz ...
  • Physiological responses of pilots to severe weather flying
    Physiological responses of pilots to severe weather flying.
    McKenzie, Jess M. ;
    Fiorica, Vincent
    1966-07-01 | PDF
    Selected measurements of stress-related and other physiological variables were made on jet aircraft pilots participating in USWB-NSSL turbulent weather programs. Data were gathered from two categories of flying conditions: (1) storm penetration flights (Scimitar type aircraft) and (2) storm perimeter flights (Canberra type aircraft). Measurements m ...
  • Human factors in general aviation accidents
    Human factors in general aviation accidents.
    Dille, J. Robert ;
    Morris, Edward W.
    1966-07-01 | PDF
    During the twelve months ending October 31, 1965, there were 122 fatal general aviation accidents in the Western Region in which the Regional Flight Surgeon's office was notified and the wreckage was located within one week. Autopsies were obtained in 86 pilots and blood alcohol determinations were obtained on 83 of these. No accidents were found t ...
  • Problems in aerial application a comparison of the acute effects of endrin and carbon tetrachloride on the livers of rats and of the residual effects one month after poisoning
    Problems in aerial application : a comparison of the acute effects of endrin and carbon tetrachloride on the livers of rats and of the residual effects one month after poisoning.
    Clark, George
    1966-07-01 | PDF
    A comparison was made of the effects on the liver of carbon tetrachloride and of endrin. Rats poisoned with either endrin or carbon tetrachloride were studied in the acute stage and after a one month recovery period. With endrin, fat was deposited perilobularly in relatively fine droplets, RNA was diffuse perilobularly and was in clumps elsewhere a ...
  • Evaluation of the Stiffness of Individual Layers in a Specially Designed Pavement Facility from Surface Deflections
    Evaluation of the Stiffness of Individual Layers in a Specially Designed Pavement Facility from Surface Deflections
    Scrivner, F. H. ;
    Moore, W. M.
    1966-06-01 | PDF
    This reporting is being made simultaneously to both the Texas Highway Department and the Highway Research Board, sponsor of a related research project (NCHRP Project 1-6). It describes an assessment of the Lane-Wells Dynaflect as a nondestructive means for estimating the relative stiffness of individual layers in a flexible pavement. It represents ...
  • Nuclear moisturedensity evaluation part II final report
    Nuclear moisture-density evaluation : part II : final report.
    Scotto, John E. ;
    Higgins, C. M.
    1966-06-01 | PDF
    The determination of in-place density by the use of nuclear moisture-density devices has proven to be an exceptionally useful tool to the modern Highway Engineer. In order to adequately adapt this new testing equipment to efficient field use, evaluation of many tests under nearly every type of field condition possible was made.The research program ...
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